Two Russian missile strikes were conducted in the Zaporizhzhia region, according to the regional military administration.
Kyrylo Tymoshenko, deputy head of the office of the Ukrainian President, said Wednesday that one of the missile strikes in Zaporizhzhia injured seven.
"There is a hit in one of the enterprises ... Seven people were injured. The head of the enterprise took the employees to the shelter, which probably saved their lives."
The strikes come as Ukraine steps up its own use of long-range artillery and rocket systems.
"In the last two weeks, the situation has become much more tense as one of the Russian military bases was completely destroyed, a railway bridge was blown up, an armored train derailed," said Ivan Fedorov, the mayor of occupied Melitopol.
On Tuesday, another military base being used by the Russians was destroyed near the village of Myrne, a few kilometers from Melitopol, he added.
CNN is unable to confirm the attack on the base at Myrne.
Fedorov, who is not in Melitopol, said the Russians were "trying to block the departure of people from the occupied territories."
He said fewer cars left Melitopol yesterday and tens of thousands of people remain in the city.
"According to our estimates, up to 60,000 - 70,000 residents remain in Melitopol. This is about half of the population before the invasion," he said.